Entertainment center



FIG. 1 is a front perspective view of a entertainment center showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is an enlarged partial perspective view of the lower left corner thereof.

The bottom and rear views are not shown and form no part of the claimed design. The dashed lines represent environmental elements only and form no part of the claimed design. 

The ornamental design for an entertainment center, as shown and described. 